<http://www.w3.org/1999/02/22-rdf-syntax-ns#first>
<http://pop.h-cdn.co/assets/15/06/980x242/gallery_1423081011-mars-rover-opportunity-pia19109-main_sol3902b_cape_tribulation_l257atc_br2_1.jpg>
<http://www.popularmechanics.com/space/g1858/best-nasa-space-images-2015/>